Strange coincidence. I was listening to QSO Today this morning with Wayne Burdick N6KR from Elecraft. Wayne discusses his desire to design a rapid deployment antenna for 20m with gain "pocket yagi". The AX1 falls a bit short!
I feel as though Elecraft have reinvented the wheel here - I received a 'free' ATX Walkabout antenna when I bought my FT817 way back in 2001. I still have the ATX Walkabout, I think I even had a contract on it once, to Italy, on 6m, back when someone had paid the bill for propagation.
I'm sure Elecraft will sell loads of the AX1, especially with lovely Elecraft branding.